[UX] Add fine tune for zoom(dpi) and font size (#5432)

Close: #5312

frontend/ui/data/creoptions.lua

@@ -214,6 +214,10 @@ In the top menu → Settings → Status bar, you can choose whether the bottom m
             {
                 name = "render_dpi",
                 name_text = S.ZOOM_DPI,
+                more_options = true,
+                more_options_param = {
+                    value_hold_step = 20,
+                },
                 toggle = {S.OFF, "48", "96¹’¹", "167", "212", "300"},
                 values = {0, 48, 96, 167, 212, 300},
                 default_value = 96,
@@ -297,6 +301,18 @@ Note that your selected font size is not affected by this setting.]]),
                 name_text = S.FONTSIZE_FINE_TUNING,
                 toggle = Device:isTouchDevice() and {S.DECREASE, S.INCREASE} or nil,
                 item_text = not Device:isTouchDevice() and {S.DECREASE, S.INCREASE} or nil,
+                more_options = true,
+                more_options_param = {
+                    value_min = 12,
+                    value_max = 255,
+                    value_step = 0.5,
+                    precision = "%.1f",
+                    value_hold_step = 4,
+                    name = "font_size",
+                    name_text = _("Font Size"),
+                    event = "SetFontSize",
+                },
+                values = {},
                 event = "ChangeSize",
                 args = {"decrease", "increase"},
                 alternate = false,